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- W2373500377 abstract "X zeolite molecule sieve synthesized from natural alkaline rocks was used to absorb Pb 2+ in wastewater in this study by ion exchange and absorption experiments. The regeneration of 13X zeolite and the maximum volume of wastewater purified were explored. The experimental results showed that the efficiency of 13X zeolite as an agent capturing heavy metal ion Pb 2+ was as high as 98% or more, and concentration of Pb 2+ in the so-purified water was less than 0.4 mg/L, substantially below 1.0 mg/L stipulated by the China national wastewater discharge standard GB8978-88. Meanwhile, no efficiency reduces were found in the experiment with increasing the recycles of 13X zeolite absorbing Pb 2+ in water up to five cycles. The absorption capacity of 13X zeolite on Pb 2+ was up to 21.42 mg/g(zeolite),given the initial Pb 2+ concentration being 20 mg/L in the wastewater. In the solution concentrated with Pb 2+ desorbed from the Pb 2+ saturated zeolite after adsorption, Pb 2+ could be well precipitated as lead sulfide PbS by adding Na 2S, from which it is possible to recover metallic lead by the ordinary metallurgical processes. The mechanism for adsorption of 13X zeolite on Pb 2+ was suggested to be ion exchange and surface complex absorption, as well as general physical absorption." @default.
- W2373500377 created "2016-06-24" @default.
- W2373500377 creator A5060713563 @default.
- W2373500377 date "2003-01-01" @default.
- W2373500377 modified "2023-09-28" @default.
- W2373500377 title "THE ABSORBABILITY OF 13X ZEOLITE ON Pb ~( 2+) IN WASTEWATER: AN EXPERIMENTAL STUDY" @default.
- W2373500377 hasPublicationYear "2003" @default.
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